Guest user: An external person granted restricted access to specific parts of an organization's workspace, such as one chat group, without the permissions or visibility of a regular member.
Also known as: Guest, External user, Guest access
Key takeaways
- A guest is an outsider with access limited to what the collaboration needs.
- Guests are the textbook case for least privilege: one group, for one job, for a limited time.
- Invite guests through a controlled channel and remove them when the work ends.
- In C Chat, contractors, cleaning staff and clients join a group by invitation.
- Owners and admins can audit and export group conversations that include guests.
Most businesses don’t work alone. Cleaning crews report to facility managers, subcontractors coordinate with site supervisors, and clients want updates from the people serving them. Guest users are how a messaging tool brings these outsiders into the conversation without opening up everything else.
A guest user: a plain definition
A guest user is an external participant with deliberately narrow access. They are not employees, they are not in the company directory, and they should only see the conversation that involves them.
Typical guests include:
- Contractors and subcontractors on a construction or maintenance job.
- Cleaning or security staff from a service provider working at your site.
- Clients who want direct updates from the team serving them.
- Volunteers or family members in sectors such as nonprofits or senior care.
How it works
Guest access usually follows a short lifecycle:
- Pick the scope. Decide which single group the guest needs. If they need more than one, ask whether a separate group for that partner makes more sense.
- Invite through a controlled channel. Send the invitation to the specific person rather than posting a link in a public place.
- Set expectations. Tell the guest what the group is for and what shouldn’t be shared there.
- Review periodically. Check guest lists monthly; access tends to outlive the work.
- Remove when done. End access the day the contract or project closes.
The guide to inviting guests and contractors safely expands on each step.
Why it matters for business messaging
Without a guest model, teams either leave outsiders out of the loop, which slows work, or add them to everything, which exposes internal discussions. A frequent version of the second mistake is adding a client to a personal WhatsApp group that also holds staff complaints and other clients’ details.
Guests are the clearest application of the principle of least privilege: they get exactly one conversation, for exactly as long as the work lasts. They also fit zero trust security, which never assumes that someone inside a chat should be inside every chat.
How it relates to C Chat
In C Chat, teams (workspaces) contain groups, and guests such as contractors, cleaning staff or clients can join a group by invitation. You can invite by link, QR code, WhatsApp, SMS or email, and the guest signs up with a phone number or email like any other user. The details are on the guest access page and in guest access security.
Group conversations that include guests are part of the team’s records: owners and admins can audit and export them. Direct messages between people remain private.
Common setups:
- A facility manager running one group per vendor, as in facility vendor coordination.
- A cleaning company with one group per client building, described in cleaning client sites.
- A general contractor with a group per trade, covered in construction subcontractor coordination.
- Care homes keeping families updated, as in senior care, or nonprofits coordinating volunteers.
Related terms and common misconceptions
- “A guest is just a member with a different label.” A guest’s scope should be narrower by design, and role planning should reflect that; see role-based access control.
- “Invite links are always safe.” A forwarded link can bring in the wrong person. Share links directly and check who joined.
- “Once the job is done, guests don’t matter.” Lingering guests are one of the most common forms of stale access.
Getting started
Create a group for your next vendor or client at getcchat.com/c and send them an invitation. C Chat is free for now with up to 50 members per team; check the full limits on the pricing page.
Frequently asked questions
What is the difference between a guest and a member?
A member belongs to the organization's workspace and can be added to its groups. A guest comes from outside and is invited to a specific group for a specific purpose. Guests should not see the organization's other conversations.
Can a guest user see all my company's chats?
They should not. A well-designed guest model limits the guest to the group they were invited to. In C Chat, a guest joins a group by invitation, so they take part in that group's conversation rather than the whole team.
When should I remove a guest?
As soon as the reason for their access ends: the contract finishes, the project closes or the service stops. Put the removal in your offboarding or contract-closure checklist so it isn't forgotten.
How do I invite a guest in C Chat?
Open the group you want them in and share an invitation by link, QR code, WhatsApp, SMS or email. The guest signs up with their phone number or email and joins that group.